Magnetism vs Altitude: Magnetic Pull & Gravity

[homerwho]

Magnetism as an attractive force can overcome gravity and lift things. I'm suggesting that a horseshoe magnet will overcome gravity and lift things off of the ground. Is there a reduction of magnetic pull with altitude?

 

[trurle]

Force between two magnets falls off 1/r^4, where r-distance between magnets.

The "magnetic levitation" technology do exist and is generally effective up to 30cm altitude. Google "maglev" for details.

 

[homerwho]

I've seen the levitating frog in a magnetic field. I asking if a horeshoe magnet and an iron plate stuck to the magnet. Will altitude decay the force on the plate to where the plate falls off of the magnet

 

[trurle]

I've seen the levitating frog in a magnetic field. I asking if a horeshoe magnet and an iron plate stuck to the magnet. Will altitude decay the force on the plate to where the plate falls off of the magnet

Typical horseshoe magnet (hard ferromagnetic) attraction to nearby soft ferromagnetic (iron plate) is independent of altitude.